28055866368 has 44 divisors (see below), whose sum is σ = 74779120760. Its totient is φ = 9351954432.

The previous prime is 28055866361. The next prime is 28055866429. The reversal of 28055866368 is 86366855082.

It is a super-2 number, since 2×28055866368² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28055866361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4563313 + ... + 4569456.

Almost surely, 2^28055866368 is an apocalyptic number.

It is an amenable number.

28055866368 is an abundant number, since it is smaller than the sum of its proper divisors (46723254392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28055866368 is an equidigital number, since it uses as much as digits as its factorization.

28055866368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132792 (or 9132774 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 57.

The spelling of 28055866368 in words is "twenty-eight billion, fifty-five million, eight hundred sixty-six thousand, three hundred sixty-eight".